Both are excellent forks.
55 will require less frequent maintenance to maintain excellent performance.
36 will require that you meet or beat Fox's recommended service intervals to maintain optimal performance.
I prefer Fox's damper over the Marz damper in shorter travel forks.
Both forks are very stiff and can take a beating.
55 will feel plusher and have excellent small bump compliance.
36 will feel great as well, it just doesn't have the classic Marzocchi feel that you get from the coil/oil and RC3 set up.
The benefits of the 36 Fox air forks for most riders are the light weight and stiff chassis.

Why don't you run a bos Deville? I am super satisfied with it. Great control, stiff chassis and low maintenance. Yes it is pricy but you get what you pay and it isn't far from a fox's price. You are in Europe so support is no issue.
If you want you can go for an Idylle air single crown for even more stiffness.

Why don't you run a bos Deville? I am super satisfied with it. Great control, stiff chassis and low maintenance. Yes it is pricy but you get what you pay and it isn't far from a fox's price. You are in Europe so support is no issue.
If you want you can go for an Idylle air single crown for even more stiffness.

I have thought about a Bos, especially the Idylle because of the 36 sanctions... but where i live i only have one dealer that can service them and its kind of far away...

I swapped a pushed Talas 36 for a Marz 55 RC3 this past year on my Uzzi and it was a night and day difference in plushness. I really had to stay on top of the maintenance of the Fox to keep it feeling just ok. The Marz far exceeds the plushness of the Talas, even in my one year of maintenance neglect.

Bear in mind, the Talas feels worse than a Float, but I cannot imagine the difference being large enough to catchup with the Marz. If you don't mind the weight, the Marz would be the right choice.

It is certainly your perogative, but that is a lot of fork for that bike. It will raise your BB quite a bit, and is much burlier than that frame - the 55 would be writing checks the rest of the bike may not be able to cash. Have you considered the Marzocchi 44 RC3 ti? It would be better matched and offer the same benefits.

I've been beating on a 2012 55 Micro Ti at least once, sometimes twice a week for the last 10 months. The performance has been killer, nothing but buttery smooth, bottomless speed. Its my first air fork, and I've been pleasantly surprised.

In the 10 months that I've been riding this thing, the closest thing I've done to any kind of maintenance checking the air pressure every couple of rides. It's just now getting a LITTLE clacky when I'm climbing. I'm thinking that most of its competitors would have seen the workbench a couple of times by now.